January 1 – April 30
Monday – Friday 8:00 am – 5:00 pm
(other times available by appointment)

May 1 – December 31
Monday – Thursday 9:00 am – 4:00 pm
(other times available by appointment)

phone 715-723-7500
fax 715-723-7503
17 W Central Street
Chippewa Falls, WI 54729


Tax Services

  • Individual Income Tax Preparation
  • Business Tax Preparation
  • Fiduciary Tax Preparation
  • Tax Planning and Consulting
  • Personal Property Tax Reporting

Professional Bookkeeping

  • Financial Statement Preparation
  • Payroll Preparation and Tax Reporting
  • Sales Tax Preparation
  • Monthly/Quarterly/Yearly Processing of Financial Information
  • Bill Paying Service
  • Personal Property Tax Reporting
  • Business Consulting and Start-up Assistance
  • QuickBooks Setup and Assistance

About our Firm

On January 1, 2017, Aaron Thompson and Karen Falkenberg purchased Brienzo CPA Service Corp in downtown Chippewa Falls, Wisconsin.  Thompson & Falkenberg CPAs, LLC was created in its place.  Our CPA Firm specializes in providing comprehensive bookkeeping and tax accounting services for individuals and small businesses.


Aaron graduated from UW Eau Claire in 2005 with a degree in both Accounting and Finance. Since then he has been preparing a variety of tax returns.  He worked at Brienzo CPA Service Corp. for nine years before buying the business in 2017.  Aaron is the manager of our Tax Services division.  He specializes in preparing individual tax returns and various types of business returns.  He has lived in Eau Claire since 1998 and has a wife and three young children.


Karen also attended UW Eau Claire and graduated in 2002 with a degree in both Accounting and Finance. She worked as a tax accountant for three years before starting her own accounting services business.  For 13 years she successfully operated Clearwater Accounting, LLC, out of her home while her three children were growing up.  In 2017, the clients of Clearwater Accounting, LLC, moved with Karen to Thompson & Falkenberg CPAs, LLC.  Karen is the manager of our Accounting Services division and will help with tax returns as needed.  She specializes in providing comprehensive bookkeeping services to clients in a variety of industries.  She and her husband have called the Chippewa Valley home since 2000.  They have three children and enjoy spending time on the lake in the summer.